Enameling marble



UNITED STATES PATENT OFFICE.

ELLEN JANE FISCHER, OF PHILADELPHIA, PENNSYLVANIA.

ENAM ELlNG MARBLE.

SPECIFICATION forming part of Letters Patent No. 552,993, dated January 14, 1896.

Application filed August 12, 1895. Serial No. 55 9,063. (No specimens.)

To all whom it may concern:

Be it known that I, ELLEN J ANE FISCHER, a citizen of the United States, residing at Philadelphia, in the county of Philadelphia and State of Pennsylvania, have invented certain new and useful Improvements in Enanieling Marble; and I do declare the following to be a full, clear, and exact description of the invention, such as will enable others skilled in the art to which it appertains to make and use the same.

The object of my invention is to create an enamel or glossy surface upon marble by the employment of acid.

In order to apply my invention, I take the marble upon which an enameled surface is desired and immerse the same, either entirely or only partially, into a solution consisting of about one (1) part commercial muriatic acid to seven ('7) parts water, and leave the marble therein until, by examination, the immersed surface presents the desired enameled appearance. This will require about twenty (20) minutes time, after which the marble may be washed.

The marble may be of any size or shape, smooth or roughhewn, new or old, and whether intended for in or out door building purposes or works of art.

If it should be impracticable to immerse the marble into the solution of acid, the same result canbe attained by infusing the solution for about the same length of time.-

In the foregoing I have only referred to muriatic acid, which is also termed hydrochloric acid, marine acid, and spirit of salt, because I found this to serve the purpose best, although nitric acid, as also other acids, can be employed in a like manner.

Having fully described my invention, what I claim, and desire to secure by Letters Patent, is

1. The process of imparting to marble a surface having a glossy or enameled appearance, which consists in subjecting the surface of the marble to the action of an acid, such as described, substantially as set forth.

2. The process of imparting to marble a surface having a glossy or enameled appearance, which consists in subjecting the surface of the marble to the action of hydrochloric acid, substantially as set forth.

In testimony whereof I affix my signature in presence of two witnesses.

ELLEN JANE FISCHER.

Witnesses:

ERNEST J. FISCHER, FRANK M. GORMLEY. 

